Rotary valve



April 24, 1928.

W. D. TIPTON ROTARY VALVE Filed July 25. 1923 2 Sheets-Sheet 1 nag l Wliam D. j

April 24, 1928. 1,667,228

' W. D. TIPTON ROTARY VALVE Filed July 25, 1923 2 Sheets-Sheet AWW - 7 m ,4 flitgDj u a m //AA Patented A 24 1928.

WILLIAM B. Timon, or BALTIMORE, MARYLAND ROTARY VALVE;

Application filed Iuly 25, 1923. Serial No. 653,799.

This invention relates to improvements in rotary valves for internal combustion or steam engines and more particularly to the specific construction and arrangement of the several parts of the valve.

An object pot the invention is to provide a suitable rotary'valve for an internal combostion or steam engine which will be provided with a pair of spaced bypasses which function for both the exhaust and inlet.

Anotherobject of the invention is to provide a rotary valve which will be formed with a pair of spaced shoes which will be slidably'carried by the valve body and Separated from each other by a pair of spaced bypasses. a

- A still further objectot the invention is to provide a rotary valve for internal co1nbustion orsteani engines to be so positioned that it will receive a quantity of oil from the crank case of the engine to lubricate the same. 1 a.

A still furtherobject of the invention is to providean improved rotary valve for internal con'ibustion or steam engines which will be highly efficient in use and quite inexpensive to manufacture. I

The other objects will appear as the description proceeds.

In the accompanying drawings which form a part of my application, I

Fig. l is a side elevation partly in section I of a portion of an internal combustion engine showing my improved rotary valve construction in operative position;

Fig. 2 is a transverse sectional view through the valve showing one of the valve shocs completely sealing the entrance to the cylinder;

Fig. 3 is a transverse sectional View through the valve showing the same in position to draw in a small amount of lubricant for lubricating the valve;

Fig. 4- is a transverse sectional view through the valve showing the same in such position as to permit the combustion charge to enter the inlet and pass into the cylinder; and,

F 5 is a transverse sectional view of a modification of my valve structure.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate cor responding parts. I

The engine cylinders or block 1 is adapted to receive and support an integrally formed valve housing or;.head 2 in which will be positioned the rotaryvalvefl which will be rotatably supported in the ball bearings 5 A suitable cover plate 5 is adapted to be secured ttrtlie end of the valve housing to hold the ballbearings or race 4 in position.

Pistons v(S are adapted to be positioi ied within cylinders l and to operate therein in the customary manner.

The body of the valve 3 substantially rectangularinshapeand is. provided at two of its sides with the recesses twhich are adapted to slidably receive the shoe members 8. These members 8 are provided with shank portions 9 which are of ap 'iroximately the same size as the recesses 7. Packing rings 10 are positioned within-annular recesses in lillti Stlltlfllitllik portions 9 and are adaptedto-engage the circular wall of therecesses 7, Each shoe ,8 is also provided with a port l1 whlch extends coii'ipletely through registerin on the compression and expansion strokes, with.tliecylinder portfE21. By

passesl2 are formed attlie opposite. sides of the said valve and are spaced apart by the shoe members 8. y e The valve housing 2 is provided with hollow channels 13 which are adapted to be filled with water for use in the cooling of the valve.

An Qiilduct 14: is positioned adjacent the top of the housing 2 and extends substantially the entire length of the valve and receives a suitable supply ofoil from the crank case to properly lubricate the valve.

The inlet ports 15 and the exhaustv ports 16 are formed at the opposite. sides of said valve housing and cooperate with the valve for permitting the charges of combustion to enter from the intake to the cylinders and :for permitting the exhaust gases to pass lows: On the compression and expansion strokes the portll through the shoe registers with the cylinder port 21 and allows the gas to pass in behind the shank portion of it thereby PHI Hill

the shoe members and forces the said member behind the shoe member tightly against its side, thereby sealing the port. The valve being provided with two bypasses 11 which tunction for both the exhaust and inlet either ignited or carried awayby the haustof the other cylinders.

lVhen the valve is in the position indicated in Fig, kl oi the drawings the oil mist for lubricating the said valve will he drawn from the crank casein sutticient quantity due to the suction furnished by the other (:y'linders, and this oil mist displaces the inlet gas which is present in th'e'bypass, thereby saving the inlet gas which ordinarily would be wasted. that the bearing surface of the valve which makes contact with the valve housing, namely, the surface of a shoe, is at all times in contact with the wall of the housing and being provided with sharp leading edges designated by numeral 22 on the drawingsi will remove all particles of carbon which might collect on the valvehousing surface; and since no clearance thcrc't'ore exists between the bearing surfaces ot the valve and its housing, no carbon or dirt can get be tween these surfaces to cause scoring.

It will be understood that I do not intend to limit myself to the specific construction Another teatnre of this design is and arrangement of parts as described and claimed,as many minor, changes in detail of description may be resorted to without departure from the spirit oi the invention.

Having thus described'my invent-ion what I claim. as new and desire to secure by Letters Patent of the United States is Q1;lnnaniinternal combustion engine, in combination with the cylinder, avalve chamber having an inlet port, exhaust port and cylinder-port, of a rotary valve positioned within said valve chain er, comprising a body portion provided with circular pockets, shoe members slidable radially mounted piston tight in the circular pockets of said body portiointhe said shoe-members having ports arranged to register with the cylinder port on the compression and expansion stroke of the engine." 1 i in an internal con'ibustion engine, in combination with the cylinder, a valve chamber havingan inlet port exhaust port and cylinder port, of a rotaryamlve positioned within said valve chamber, comprising a body portion provided with circular pockets, shoe members radially slidable mounted piston tight in the circular pockets of said body portion; the body portion and shoe members being in spaced relation -whereby gas is al-' lowed to pass in behind the shoe member forcing the said shoe meniber tightly against the inside circ-um'lerence otthe valve chamber. thereby positively sealing the port.

In testil-nony whereof I aliix my signature.

\VILLIAM D. TIPTON. 

